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Defined in header <math.h>
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<td></td> <td></td> <tr class="t-dcl ">

<td >
#define isnormal(arg) /* implementation defined */
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<td class="t-dcl-nopad"> </td> <td > (since C99) </td> </tr> Template:ddcl list end

Determines if the given floating point number arg is normal, i.e. is neither zero, subnormal, infinite, nor NaN. The macro returns an integral value.

Parameters

arg - floating point value

Return value

Nonzero integral value if arg is normal, 0 otherwise.

See also

Template:c/numeric/math/dcl list fpclassifyTemplate:c/numeric/math/dcl list isfiniteTemplate:c/numeric/math/dcl list isinfTemplate:c/numeric/math/dcl list isnan
C++ documentation for isnormal